C - Chemistry – Metallurgy – 22 – B
Patent
C - Chemistry, Metallurgy
22
B
C22B 3/04 (2006.01)
Patent
CA 2726655
A process of leaching a metal value such as nickel and/or cobalt from a metal laden solid, for example an ore such as laterite, comprises the steps of (a) contacting the metal laden solid with a leach solution comprising a mineral acid and an organic acid such as malic acid to provide a leachate including the metal value, (b) adding further organic acid to the leachate including the metal value, and (c) using the leachate including the metal value from step (b) as at least a portion of the leach solution in step (a). Steps (a) to (c) can be repeated any number of times, for example two or three times or more.
La présente invention concerne un processus destiné à lixivier un métal de valeur, tel que le nickel et/ou le cobalt, d'un solide chargé en métaux, par exemple un minerai tel que la latérite, qui consiste (a) à mettre le solide chargé en métaux en contact avec une solution de lixiviation renfermant un acide minéral et un acide organique tel que l'acide malique, afin de fournir un lixiviat renfermant le métal de valeur, (b) à ajouter un autre acide organique au lixiviat renfermant le métal de valeur, et (c) à utiliser le lixiviat renfermant le métal de valeur de l'étape (b) au moins en tant que partie de la solution de lixiviation de l'étape (a). Les étapes (a) à (c) peuvent être répétées un nombre quelconque de fois, par exemple deux, trois fois ou plus.
Bereskin & Parr Llp/s.e.n.c.r.l.,s.r.l.
The University Of Sydney
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